May be the perfect combination of cargo capacity and hydration. 100 oz / 3 liter reservoir, 2 large gear pockets with BlackHawk's BTS system for attaching our complete range of pouches or duty gear. All this plus our standard HydraStorm features make the Tsunami hard to beat. Made of rugged NyTaneon with HydraStorm's rugged, comfortable, fully adjustable quick-ditch harness. Special features include: IVS compression molded foam intercooler back panel, revitalizes, cools, and enhances pack support and performance.